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Articles 10231 - 10260 of 11285

Full-Text Articles in Weed Science

The Prairie Naturalist 2008, Volume 40: Reviewers, Author Index, & Subject Index Sep 2008

The Prairie Naturalist 2008, Volume 40: Reviewers, Author Index, & Subject Index

The Prairie Naturalist

No abstract provided.


Paddlefish Egg Deposition In The Lower Yellowstone River, Montana And North Dakota, Shannon E. Miller, Dennis L. Scarnecchia, Steven R. Fain Aug 2008

Paddlefish Egg Deposition In The Lower Yellowstone River, Montana And North Dakota, Shannon E. Miller, Dennis L. Scarnecchia, Steven R. Fain

The Prairie Naturalist

We used passive egg collectors during May, June, and July of2003 and 2004 in the lower 50 river kiiometers (rkm) of the Yellowstone River, eastern Montana and western North Dakota, to detect egg deposition by spawning paddle fish (Polyodon spathula). Sampling yielded 292 eggs (46 in 2003 and 246 in 2004). All egg collections in 2003 occurred on the descending limb of the spring hydrograph but 99% of egg collections in 2004 occurred before the spring hydrograph began to descend. Catch-per-unit-effort (CPUE) in 2004 was about four times that of 2003. A combination of river conditions, in addition …


Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, April 1, 2008 To June 30, 2008, Margaret N. Rees Jul 2008

Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, April 1, 2008 To June 30, 2008, Margaret N. Rees

Vegetation Monitoring

Executive Summary

  • The Weed Sentry program surveyed over 182 miles of transportation corridors on federal land in Clark County for incipient populations of exotic plants.
  • Five manuscripts attained published or in-press status this quarter. The published manuscripts are (1) assessing vegetation in grassy remnants of the Las Vegas Valley (Desert Plants), (2) assessing exotic species distributions in Clark County (Environmental Monitoring and Assessment), (3) a synthesis of burro effects on Mojave Desert vegetation (Environmental Management), and (4) examining canopy-tree influences along a soil parent material gradient in (Journal of the Torrey Botanical Society).
  • Staff delivered eight presentations this quarter at …


Mojave Applied Ecology Notes Summer 2008, Doug Merkler, Scott R. Abella, Dianne N. Bangle, Donovan J. Craig, Jessica E. Spencer, Alex Suazo Jul 2008

Mojave Applied Ecology Notes Summer 2008, Doug Merkler, Scott R. Abella, Dianne N. Bangle, Donovan J. Craig, Jessica E. Spencer, Alex Suazo

Mojave Applied Ecology Notes

Soil climate project, rare plant monitoring, JFS update, granivory and Sahara mustard


An Overview Of The Vegetation Research Program: Knowledge Services For Land Management, Scott R. Abella Apr 2008

An Overview Of The Vegetation Research Program: Knowledge Services For Land Management, Scott R. Abella

Fire Science Presentations

  • Provide knowledge services about the ecology and management of southwestern dryland ecosystems
  • Specialize in working with resource managers to conduct applied research
  • Conduct and provide research, monitoring, scientific literature synthesis, and technical assistance


Plant Community Response To Fire: A Chronosequence Study, Scott R. Abella, E. Cayenne Engel Apr 2008

Plant Community Response To Fire: A Chronosequence Study, Scott R. Abella, E. Cayenne Engel

Public Policy and Leadership Faculty Research

Fires are becoming more prevalent events across the landscape in the southwestern US. Over the next several decades the already arid southwest is predicted to become warmer and drier, with longer summers, and an increase of “extreme” weather events such as lightening inducing thunderstorms. While the “hotter and drier” forecast may indicate less abundant plant life, and thus less available biomass for fuel, exotic invasive plant species are becoming more dominant across the landscape with increases in human travel and commerce. Exotic species (particularly many of the invasive grasses) are adding fuel for the fires to burn when the annuals …


Mojave Applied Ecology Notes Spring 2008, Lesley Defalco, E. Cayenne Engel, Scott R. Abella, Jessica E. Spencer, Jill E. Craig Apr 2008

Mojave Applied Ecology Notes Spring 2008, Lesley Defalco, E. Cayenne Engel, Scott R. Abella, Jessica E. Spencer, Jill E. Craig

Mojave Applied Ecology Notes

Post-fire restoration, fire chronosequence study, Joint Fire Science update, Weed Sentry program and DNWR surveys


Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, January 1— March 31, 2008, Margaret N. Rees Mar 2008

Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, January 1— March 31, 2008, Margaret N. Rees

Vegetation Monitoring

Executive Summary

  • The Weed Sentry program surveyed 104 miles of transportation corridors on federal land in Clark County for incipient populations of exotic plants.
  • Seven manuscripts attained in-press or published status and two manuscripts were submitted for review this quarter. Among other in-press manuscripts, are one documenting Sahara mustard germination patterns (Western North American Naturalist), one assessing exotic species distributions in Clark County (Environmental Monitoring and Assessment), and another is a synthesis of burro effects on Mojave Desert vegetation (Environmental Management).
  • Staff delivered four presentations this quarter at conferences or at agency meetings. Twenty-six Las Vegas bearpoppy sites were assessed …


West Nile Virus Antibodies In Breeding North Dakota Icterids, Jennifer L. Newbrey, Wendy L. Reed Mar 2008

West Nile Virus Antibodies In Breeding North Dakota Icterids, Jennifer L. Newbrey, Wendy L. Reed

The Prairie Naturalist

Exotic infectious diseases can have devastating effects on the distribution and abundance ofnaYve wildlife species (Friend et al. 2001). West Nile Virus (WNV) is an exotic disease that was introduced into North America in 1999 and has resulted in the deaths of tens of thousands of birds (Marra et al. 2004). The natural cycle of WNV involves Culex spp. mosquitoes as principle vectors and birds as principle hosts, although humans, horses, and other mammals can become incidental hosts (Lanciotti et al. 2000). Because the virus can be fatal, outbreaks have become a national health concern for the human population, an …


Review Of Basic Texas Birds: A Field Guide By Mark W. Lockwood, Thomas M. Langschied Mar 2008

Review Of Basic Texas Birds: A Field Guide By Mark W. Lockwood, Thomas M. Langschied

The Prairie Naturalist

Texas has an incredible diversity of birds. This diversity is a result of its geographic location, size, and diversity of habitats. Given this wealth of birds, there is a wonderful opportunity in Texas for both residents and visitors alike to learn and appreciate the birdlife found there. Basic Texas Birds has been written to provide a foundation for anyone who is either new to bird-watching or has been bird-watching casually for several years. The book covers 161 commonly occurring birds in Texas and includes an additional 23 species that are considered Texas specialty birds, those that occur regularly in Texas …


The Prairie Naturalist. Volume 40, No. 112 March/June 2008, The Great Plains Natural Science Society Mar 2008

The Prairie Naturalist. Volume 40, No. 112 March/June 2008, The Great Plains Natural Science Society

The Prairie Naturalist

LOW REPRODUCTIVE SUCCESS OF MALLARDS IN A GRASSLAND-DOMINATED LANDSCAPE IN THE SANDHILLS OF NEBRASKA. J. A. Walker, Z. J. Cunningham, M. P. Vrtiska, S. E. Stephens, and L. A. Powell

USE OF PASSIVE INTEGRATED TRANSPONDERS IN HATCHLING TEXAS HORNED LIZARDS. S. E. Henke

INFLUENCE OF TEMPERATURE AND DISCHARGE ON REPRODUCTIVE TIMING OF COMMON CARP IN A NORTHERN GREAT PLAINS RIVER. T. Resseguie and S. Kelsch

RAPTOR USE OF ARTIFICIAL PERCHES AT NATURAL AREAS, CITY OF FORT COLLINS, COLORADO. G. Witmer, M. Pipas, P. Burke, D. Rouse, D. Dees, and K. Manci

WEST NILE VIRUS ANTIBODIES IN BREEDING NORTH DAKOTA ICTERIDS. …


Review Of Oology And Ralph's Talking Eggs By Carrol L. Henderson, Kristin R. Johnson Mar 2008

Review Of Oology And Ralph's Talking Eggs By Carrol L. Henderson, Kristin R. Johnson

The Prairie Naturalist

Ralph Handsaker was an Iowan farmer whose "ravenous curiosity" (page 4) about the natural world inspired him to become an oologist, or egg collector. This book tells the story of Handsaker's eggs, contained in two large cabinets that remained hidden in the living room of his boarded-up house after his death in 1969, until they were rediscovered in 2003 and shown to the author, wildlife conservationist, and photographer, Carrol Henderson. Ralph's eggs can "talk" by virtue of Henderson's chronicle-using the eggs as guides-of not only Ralph's own passion for natural history and egg collecting, but also the history of conservation …


Influence Of Temperature And Discharge On Reproductive Timing Of Common Carp In A Northern Great Plains River, Tim Resseguie, Steve Kelsch Mar 2008

Influence Of Temperature And Discharge On Reproductive Timing Of Common Carp In A Northern Great Plains River, Tim Resseguie, Steve Kelsch

The Prairie Naturalist

Reproductive timing of common carp (Cyprinus carpio) was examined in the Red River of the North and compared with environmental factors that might have triggered spawning during 1999 and 2000. We estimated spawn dates for individual common carp larvae collected in the drift by back-calculating from datc of capture and by accounting for developmental stage at capture and water temperature during the period of egg incubation. Reproductive timing was compared with discharge and water temperature to determine which of these likely might be a synchronizing cue for spawning of common carp in the Red River basin. In both years of …


Review Of Roger Tory Peterson: A Biography By Douglas Carlson, Laura Erickson Mar 2008

Review Of Roger Tory Peterson: A Biography By Douglas Carlson, Laura Erickson

The Prairie Naturalist

August 28, 2008, marks the centennial of Roger Tory Peterson's birth, and books related to the most prominent naturalist of the twentieth century have been sprouting up everywhere. I was disappointed that Douglas Carlson shied away from examining Peterson's personal life to provide insights into the forces and relationships that shaped, and were shaped by, this man so consumed with birds. Instead, Carlson focuses almost entirely on Peterson's work, writing, "Because his death is so recent, there are many who have a personal investment in his story; beyond a request for an interview, no attempts have been made to invade …


Raptor Use Of Artificial Perches At Natural Areas, City Of Fort Collins, Colorado, G. W. Witmer, Michael Pipas, Patrick Burke, David Rouse, Donna Dees, Karen Manci Mar 2008

Raptor Use Of Artificial Perches At Natural Areas, City Of Fort Collins, Colorado, G. W. Witmer, Michael Pipas, Patrick Burke, David Rouse, Donna Dees, Karen Manci

The Prairie Naturalist

The black-tailed prairie dog (Cynomys ludovicianus) remains a critical element of the prairie ecosystem even though its numbers and occupied range have declined dramatically since the arrival of Europeans in North America (Antol in et al. 2002). Prairie dog colonies are used by many species of wildlife and help maintain high levels of biodiversity (Kotliar et al. 1999). In the urban-suburban setting, the occurrence of prairie dog colonies also provides opportunities for wildlife viewing and environmental education. Unfortunately, prairie dogs also can come into conflict with humans, especially in the urban-suburban setting, where they cause vegetation and property …


Low Reproductive Success Of Mallards In A Grassland-Dominated Landscape In The Sandhills Of Nebraska, Johann A. Walker, Zach J. Cunningham, Mark P. Vrtiska, Scott E. Stephens, Larkin Powell Mar 2008

Low Reproductive Success Of Mallards In A Grassland-Dominated Landscape In The Sandhills Of Nebraska, Johann A. Walker, Zach J. Cunningham, Mark P. Vrtiska, Scott E. Stephens, Larkin Powell

The Prairie Naturalist

The Sandhills of Nebraska comprise approximately 5,000,000 ha of native grassland interspersed with numerous groundwater-fed wetlands. A substantial population of the mallard (Anas platyrhynchos) nests in this region. Previous investigations of nest survival probability of ducks in the Sandhills have estimated surprisingly low rates of nest survival for a grassland-dominated landscape. These investigations were conducted on public lands and most nest searching took place near wetlands where activity of nest predators might be highest. We predicted that mallards would nest at varying distances from wetlands and that survival probability of a representative sample of duck nests would increase …


Breeding By The Snowy Plover In North Dakota And South Dakota, Carol Aron, Paul Van Ningten, Michael Rabenberg, Cheryl Jacobs, Greg Pavelka, Ricky D. Olson Mar 2008

Breeding By The Snowy Plover In North Dakota And South Dakota, Carol Aron, Paul Van Ningten, Michael Rabenberg, Cheryl Jacobs, Greg Pavelka, Ricky D. Olson

The Prairie Naturalist

The snowy plover (Charadrius alexandrinus) is a small shorebird that breeds on unvegetated beaches along coastlines, rivers, and alkaline lakes. In North America, its breeding distribution extends along the coasts of California, Oregon, and southern Washington, where the population is listed as federally threatened (USFWS 1993), and an interior population occurs on wetlands in western and central states and central Mexico (Page et al. 1995). There have been rare breeding reports in Montana, Wyoming, and Saskatchewan (Page et al. 1995), but no documented breeding records in North Dakota or South Dakota. However, the United States Army Corps of Engineers reported …


Crop Updates 2008 - Weeds, Craig A. Ruchs, Abul Hashem, Catherine Borger, Ken Mckee, Peter Newman, Aik Cheam, Siew Lee, Meagan Pearce, Michael Walsh, Stephen Powles, Kent Stone, Mike Clarke, Andrew Loorham, Roberto Busi, Shahab Pathan, Alexandra Douglas, Ray Fulwood, Chris Roberts, Glen Riethmuller, Sally Peltzer, Lorinda Hunt, John Borger, Meir Altman, Ed Barrett-Lennard, Stephen Davies, Pippa Michael, Bill Mcleod, Harmohinder Dhammu, Mark Seymour, Vince Lambert, John H. Moore, Rohan Rainbow Feb 2008

Crop Updates 2008 - Weeds, Craig A. Ruchs, Abul Hashem, Catherine Borger, Ken Mckee, Peter Newman, Aik Cheam, Siew Lee, Meagan Pearce, Michael Walsh, Stephen Powles, Kent Stone, Mike Clarke, Andrew Loorham, Roberto Busi, Shahab Pathan, Alexandra Douglas, Ray Fulwood, Chris Roberts, Glen Riethmuller, Sally Peltzer, Lorinda Hunt, John Borger, Meir Altman, Ed Barrett-Lennard, Stephen Davies, Pippa Michael, Bill Mcleod, Harmohinder Dhammu, Mark Seymour, Vince Lambert, John H. Moore, Rohan Rainbow

Crop Updates

This session covers twenty nine papers from different authors:

1. BOXER® GOLD, a new pre-emergent herbicide option for WA wheat and barley growers for the control of Annual Ryegrass and Toad Rush, Craig A. Ruchs, Syngenta Crop Protection Australia Pty Ltd

2. Efficacy of Boxer Gold in the control of annual ryegrass in wheat, Dr Abul Hashem, Dr Catherine Borger, Department of Agriculture and Food, Mr Ken McKee, Field Development Manager, Syngenta Crop Protection Australia Pty Ltd

3. Alternative herbicides to avoid trifluralin resistance, Catherine Borger and Abul Hashem, Department of Agriculture and Food

4. Exiting …


Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas Jan 2008

Early Season Weed Suppression In Buckwheat Using Clopyralid, Ona Sakaliene, Sharon A. Clay, William C. Koskinen, Gediminas Almantas

Agronomy, Horticulture and Plant Science Faculty Publications

Currently there are no herbicides registered for direct application to buckwheat for broadleaf weed control. This 4-yr Lithuanian study examined weed control using several rates of clopyralid alone or combined with a single rate of desmedipham. Most applications were applied at the 1-leaf stage of crop growth, however, one rate of clopyralid was applied pre-emergence (PRE) in 2 of the 4 yr. Buckwheat injury was evident within a few days after application (or emergence) with all treatments, but by harvest, no symptoms were evident. In the 2 yr with greatest weed densities, densities were reduced with increasing clopyralid rates alone …


Use Of Passive Integrated Transponders In Hatchling Texas Horned Lizards, Scott E. Henke Jan 2008

Use Of Passive Integrated Transponders In Hatchling Texas Horned Lizards, Scott E. Henke

The Prairie Naturalist

The Texas horned lizard (Phrynosoma cornutum) is a Texas state-threatened species and acquisition of data related to the species' ecology is essential. To accomplish this task individual animals need to be marked. Many marking techniques are available for lizards, however the majority of techniques have been tested on adults only. Studies involving hatchling and juvenile horned lizards are scarce due to problems associated with marking and relocating individuals in these age classes. I demonstrated that injection of passive integrated transponders (PIT's) can safely be used as a marking method in young Texas horned lizards. Thirty-two captive bred hatchling lizards were …


Mortality Of An American Marten From An Off-Highway Vehicle, Joshua B. Smith, Jonathan A. Jenks Jan 2008

Mortality Of An American Marten From An Off-Highway Vehicle, Joshua B. Smith, Jonathan A. Jenks

The Prairie Naturalist

While there are several reviews of the effects of OHVs and recreational activity on wildlife populations (Knight and Gutzwiller 1995, Joslin and Youmans 1999), most studies have focused on physiological (Creel et al. 2002) or behavioral (Van Dyke et al. 1986, Riley et al. 2003) responses to disturbance; none have addressed the potential for direct mortality. In 2005, we documented the death from an OHV of a juvenile, female American marten (F299) that had been radiocollared during a study documenting the distribution and abundance of American marten in the Black Hills, South Dakota (Smith 2007); the Institutional Animal Care and …


Seeding Effectiveness And Natural Regeneration Of Mojave Desert Plant Communities After 2005-2006 Wildland Fires, E. Cayenne Engel, Scott R. Abella, Christina L. Lund Jan 2008

Seeding Effectiveness And Natural Regeneration Of Mojave Desert Plant Communities After 2005-2006 Wildland Fires, E. Cayenne Engel, Scott R. Abella, Christina L. Lund

Fire Science Presentations

1) Assessment of BLM seeding effectiveness in mid-elevation burn where pre-burn plant communities were dominated by blackbrush, Joshua trees, and creosote.

2) Patterns driving fire recovery at the landscape scale:

  • Link initial vegetation, environment, and soils
  • Are there patterns that can be gleaned that can then be applied to management prescriptions?


Management Techniques For The Control Of Sahara Mustard (Brassica Tournefortii) In The Mojave Desert, Dianne N. Bangle, Scott R. Abella, Public Lands Institute, Jan 2008

Management Techniques For The Control Of Sahara Mustard (Brassica Tournefortii) In The Mojave Desert, Dianne N. Bangle, Scott R. Abella, Public Lands Institute,

Vegetation Monitoring Presentations

In the southwestern United States, Brassica tournefortii(Sahara mustard) is a highly invasive plant that colonizes roadsides, beaches, sand dunes, and open desert threatening native annuals. Sahara mustard is believed to contribute to fuel loads in the Mojave Desert in areas where Schismussp. and Bromussp. occur. Sahara mustard may act as ladder fuel, thereby facilitating the spread of fire throughout the landscape. Manpower limitations and insufficient funding limits the abilities of managers to effectively control Sahara mustard. We tested seed germinability in Sahara mustard after fruiting plants were treated with either 2%, 5%, or 12% triclopyr. Sahara mustard seed pods were …


Exotic Annual Plant Invasions And Their Relationships To Roads And Native Perennial Species In The Mojave Desert, Southwestern Usa, Donovan J. Craig, Jill Pacovsky Craig, Scott R. Abella Jan 2008

Exotic Annual Plant Invasions And Their Relationships To Roads And Native Perennial Species In The Mojave Desert, Southwestern Usa, Donovan J. Craig, Jill Pacovsky Craig, Scott R. Abella

Vegetation Monitoring Presentations

For the last five years, roadside monitoring for exotic invasive species has been a common practice for documenting distributions in Clark County, Nevada (Abella et al., in press). Yet, studies have shown that weed relationships to road corridors differ depending upon the natural system (Hansen and Clevenger, 2005). In the Mojave Desert, it is unknown whether exotic species are limited to or even predominant along roadsides.

Compounding this uncertainty, fertile islands under shrubs are known to enhance conditions for many annuals (Thompson et al., 2005). Thus, a site’s shrub composition could influence exotic invasive plant distributions.


Implications For Management Prioritization Of Exotic Annual Weed Monitoring Near Roadsides In The Eastern Mojave Desert, Usa, Donovan J. Craig, Jill E. Craig, Scott R. Abella, Public Lands Institute, Jan 2008

Implications For Management Prioritization Of Exotic Annual Weed Monitoring Near Roadsides In The Eastern Mojave Desert, Usa, Donovan J. Craig, Jill E. Craig, Scott R. Abella, Public Lands Institute,

Vegetation Monitoring Presentations

Invasive exotic plants provide an unnatural conduit for fires in the Mojave Desert. For the last five years, roadside monitoring for exotic invasive species has been a common practice for documenting distributions in Clark County, Nevada (Abella et al., in press). Yet, studies have shown that weed relationships to road corridors differ depending upon the natural system (Hansen and Clevenger, 2005). In the Mojave Desert, it is unknown whether exotic species are limited to or even predominant along roadsides.

Compounding this uncertainty, fertile islands under shrubs are known to enhance conditions for many annuals (Thompson et al., 2005). Thus, a …


Response Of Sahara Mustard (Brassica Tournefortii) To Water Addition And Soil Disturbance, Alexis Suazo, Jessica E. Spencer, Scott R. Abella Jan 2008

Response Of Sahara Mustard (Brassica Tournefortii) To Water Addition And Soil Disturbance, Alexis Suazo, Jessica E. Spencer, Scott R. Abella

Vegetation Monitoring Presentations

Invasive exotic species can have a significant impact on the structure, function, and diversity of ecological communities. Sahara mustard (Brassica tournefortii) is one of the top exotic invasive species spreading through the southwestern deserts of North America. In arid environments, it is well documented that species abundance is sensitive to rainfall (Beatly 1974, Ernest et al. 2000). In the Mojave Desert, winter precipitation can trigger massive germination events (Beatly 1974). As a winter annual, Sahara mustard may have a positive response to winter precipitation by germinating, growing, and reproducing before native annuals, monopolizing soil moisture and nutrients, and potentially changing …


Mojave Applied Ecology Notes Winter 2008, Scott R. Abella, E. Cayenne Engel, Jill E. Craig Jan 2008

Mojave Applied Ecology Notes Winter 2008, Scott R. Abella, E. Cayenne Engel, Jill E. Craig

Mojave Applied Ecology Notes

Mojave Desert collaborative projects, fire history in Spring Mountains, Northshore Road rehabilitation, wildfires and invasive plants in American deserts conference, weed sentry surveys


Sex-Specific Feeding Rates And Provisioning Of Fruit To Nestling Bell's Vireo, Greg H. Farley Jan 2008

Sex-Specific Feeding Rates And Provisioning Of Fruit To Nestling Bell's Vireo, Greg H. Farley

The Prairie Naturalist

Provisioning of fruit to nestlings and possible sex-specific differences in feeding rate have not been reported for Bell's vireo (Vireo bellii; Brown 1993). While studying nesting ecology of Bell's vireo on Konza Prairie Biological Station, Geary and Riley counties, Kansas, I quantified feeding rate by sex and food type delivered to nestlings. Sex was determined by capturing adults with mist-nets and inspecting for a cloacal protuberance, as well as conducting behavioral observations of uniquely-marked individuals. Males sing regularly while moving around territories, as well as during incubation (Nolan 1960). I assigned "female" to the individual in these socially …


Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, October 1, 2007 To December 31, 2007, Margaret N. Rees Dec 2007

Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Quarterly Progress Report, October 1, 2007 To December 31, 2007, Margaret N. Rees

Vegetation Monitoring

Executive Summary

  • The Weed Sentry program surveyed more than 750 miles of federal lands in Clark County for invasive, exotic plant species.
  • Weed Sentry also removed more than 600,000 individual invasive plants from federal
    lands. These removals represent pro-active efforts that may have forestalled large
    infestations difficult and costly to eradicate.
  • In response to a request by the manager of the Fish and Wildlife Service Desert National
    Wildlife Refuge, a major effort of surveying springs for plant community composition
    and invasive plants provided unique knowledge services by the Weed Sentry program.
    No such baseline information existed for the Sheep Range. …


Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Year-End Progress Report, October 1, 2006 To September 30, 2007, Margaret N. Rees Sep 2007

Lake Mead National Recreation Area Vegetation Monitoring And Analysis: Year-End Progress Report, October 1, 2006 To September 30, 2007, Margaret N. Rees

Vegetation Monitoring

Executive Summary

  • The Weed Sentry program surveyed more than 750 miles of federal lands in Clark County for invasive, exotic plant species.
  • Weed Sentry also removed more than 600,000 individual invasive plants from federal
    lands. These removals represent pro-active efforts that may have forestalled large
    infestations difficult and costly to eradicate.
  • In response to a request by the manager of the Fish and Wildlife Service Desert National
    Wildlife Refuge, a major effort of surveying springs for plant community composition
    and invasive plants provided unique knowledge services by the Weed Sentry program.
    No such baseline information existed for the Sheep Range. …